AVG is the average score; TOTSCORE is the total score of all mails seen so far; COUNT is the number of messages seen from that sender; EMAIL is the sender's email address, and IPBASE is the AWL base IP address.

AWL base IP address is a way to identify the sender's IP address they frequently send from, in an approximate way, but remaining hard for spammers to spoof. The algorithm is as follows:

- take the last Received header that contains a public IP address -- namely
one which is not in private, unrouted IP space.
- chop off the last two octets, assuming that the user may be in an ISP's
dynamic address pool.